290 Works

1.3 - Uncooled infrared detector designed for Gas detection and High temperature measurements

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Uncooled infrared focal plane arrays are being developed for a wide range of thermal imaging applications. A new type of detector for middle and long wave applications was developed based on amorphous silicon VGA device. This new detector is well adapted for gas detection, high temperature measurements, and special industrial processes (boiler control and maintenance). After a brief introduction to microbolometer technological background, the interest of such detectors will be presented by comparing LWIR /...

2.5 - New Thermal Imager for Long Range Surveillance

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The concept and design of a new thermal imager branded Attica M-ER is presented which is dedicated to long range border surveillance applications. The camera makes use of a 1280x1024 pixel CMT or InSb detector being sensitive in the MWIR atmospheric window between 3 and 5 micron. For high quality imaging with fields of view between 0.6° and 30° a 50x IR optical zoom lens is designed comprising 11 lenses. Five of the lenses are...

3.1 - Tunable laser spectroscopy combined with novel photoacoustic technology for hand-held low-ppb gas analyzers in various applications

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A versatile and modular technology suitable for several gas measurement applications requiring ppb level sensitivity and high selectivity in a hand-held size is presented. The proposed miniaturized cantilever enhanced photoacoustic detection scheme is combined with different types of NIR or MIR tunable laser sources. Several sources can be combined in the same miniaturized measurement cell and the sources are selected by the application requirements. The use of tunable laser sources provides the possibility to use...

P5 - Filtered thermal contrast technique in thermographic non-destructive testing

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A new kind of thermal contrast, called “filtered contrast” is presented, which allows detecting and characterizing material defects using active thermography under some assumptions on physical and thermal parameters of materials. In opposition to known definitions of the thermal contrast, knowledge about defect-free area is not necessary and this contrast is less sensitive to nonuniformity of heat disposal to the material surface. The measurements were performed on an experimental setup equipped with a ThermaCAM PM...

P7 - Background-Corrected Determination of Optical Properties in the Far Infrared Range up to 1 mm

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The optical properties transmittance and reflectance of materials are defined as the flux of radiation reflected from or transmitted through a sample with respect to the incident flux. Usual measurement approaches for these quantities follow these definitions and determine the quotient of the reflected or transmitted flux with respect to the incident flux. However, in the Mid and Far Infrared Range (MIR and FIR) this approach might easily lead to wrong results because background radiation...

3.4 - Dispersive IR-Spectroscopy for harsh environment based on thermopile elements realized with TPL640 (thermopile line array)

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The condition monitoring of technical fluids and gases is a fundamental key challenge for the success of ongoing efforts to save valuable fossil resources like oil and gas and to protect our environment in the future. It’s a prerequisite for an optimized utilization of raw materials and in this context essential for a cost efficient production of goods in the entire industry. So more and more often there is a substantial need for robust, cost...

E6.3 - Overview on solid-state dosimeter-type gas sensors

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Based on irreversible analyte accumulation in the sensitive layer, dosimeter-type gas sensors are promising for the long-term monitoring of low levels of analytes. Thereby, the analyte dose can be detected either during progressive analyte sorption or release with a direct correlation between the sensor response and the cumulated analyte amount. A short overview on various solid-state resistive dosimeter-type sensors for several gaseous analytes is given in order to demonstrate the potential of this cumulative sensing...

P1.6 - One-dimensional Orientation Using a Low-cost Inertial Sensor

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This paper presents one-dimensional attitude estimation using a low-cost gyroscope with help of shaping filter for industry applications. This algorithm is a part of controller module, which will be implemented in an intelligent wrench for automotive manufacturing. The orientation is primary estimated by the signals of a low-cost pinpoint gyroscope. With help of an error model based on Shaping filter method, the optimal 1-D orientation of an object is determined by compensating the estimated orientation...

P1.8 - New CAD System for Designing the Pressure Differential Flowmeters

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New CAD system is developed in order to provide computer aided design of pressure differential flowmeters for fluid energy carriers and to simplify implementation of new normative documents (ISO 5167.1,2,3,4-2003 and GOST 8.586.1,2,3,4,5-2005). This program meets the requirements of the new Standards and provides accomplishment of the following tasks: verification of conditions (constraints) for application of the pressure differential method according to the requirements of new Standards; calculation of parameters of primary device, pipe straight...

P2.2 - Test Field for the Validation of a Multifunctional Sensor for Distributed Subsurface Monitoring of Gas Storage Areas

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BAM Federal Institute for Materials Research and Testing, in cooperation with the company MeGaSen UG carries out a research project to enhance and validate an innovative approach for distributed subsurface monitoring of gas storage areas. The concept combines different measurement technologies to one multifunctional sensor: membrane-based gas measurement technology for in-situ monitoring of gases in soil and fiber optical sensing of temperature and strain (as a measure for structural change). Key aspect of the research...

D6.1 - Comparison of spatially extended fiber-optic temperature measurement systems for energy applications

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In this paper different spatially extended fiber-optic temperature measurement systems are analyzed and compared in terms of spatial and temporal resolution, accuracy and response time, cross sensitivity and calibration. The measurement systems are tested particularly with regard to the application in electric power stations. These installations like power generators, large drives, transformers, power transmission lines and gas turbines require a distribution of measurement points of some centimeters up to tens of meters. Whenever the sensor...

C7.4 - Energy Harvesting for Sensor Applications in the Energy Sector

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Because of the energy turnaround the power industry will be confronted with a massive restructuring. Only by an intelligent control prospectively it is possible to obtain a reliable energy supply. Wireless sensor systems can help to provide necessary information available as control variables. This paper presents a robust approach to use the electrostatic field of electrical equipment, for the supply of wireless sensor systems.

D7.2 - Inline viscometery for non-Newtonian viscosity characterization

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Dynamic viscosity is an important parameter for quality control in a wide range of industrial processes and is one of the most important fluid properties for the production of many significant industrial substances. In particular non-Newtonian viscosity behavior of heterogeneous mixtures (i.e., dispersions, suspensions) and polymeric solutions is an important material property that contributes to a fluid’s performance, and is often the main source of problems in handling, processing, and application. The objective of this...

C8.4 - Dual-DC/DC Strategy for Enhanced Efficiency in Solar Powered Energy Harvesting

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Powering autonomous sensor systems with ambient energy sources, called energy harvesting, has become an interesting field of research the last years. Solar based solutions belong to the most developed so far. In electronic systems the voltage of the solar cell must be regulated to match the supplied device, typically 3.3 V or 5 V. It is also necessary to buffer energy to handle peaks in the current demand. These tasks can be fulfilled by different...

D8.1 - Statistical and Semantic Multisensor Data Evaluation for Fluid Condition Monitoring in Wind Turbines

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Condition monitoring of complex systems is usually based on various sensors to gain information on the system status and identify potential problems at an early stage. However, evaluation and interpretation of multiple sensor data is often a major problem due to complex interdependencies between measured sensor data and actual system condition. We have addressed this problem for the example of a fluid condition monitoring system in wind turbines, i.e. an oil filter and cooling subsystem...

D9.2 - Impedance Measurement of Wound Infection Status

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Wound infection monitoring is a matter of high interest in wound treatment. Therefore, we extracted sensor parameters suitable to identify massive pathogen presence. One method is to measure neutrophil-derived extracellular DNA as an immediate response of the immune system. We proofed that impedance measurement is a reasonable measurement technique for this parameter. Our sensor concept comprises a plenary or fiber-based setup which could be integrated into a wound cover. Proof-of-principle experiments using impedance spectroscopy in...

D9.4 - Estimating Muscular Activity of the Quadriceps Femoris Muscles by Measuring the Change in Shape

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This paper introduces a novel sensor concept for measuring muscular activity assessing the change of the skin surface curvature. The contraction of the rectus femoris muscle is expected to provide information on the user’s intention to rise from a chair. This information will be used for the control of a motorized lower limb orthosis to improve the quality of life of people suffering from muscle weakness. Electromyography is widely used for measuring muscular activity, but...

P2.5 - High sensitivity optoelectronic sensor for nitric oxide detection in exhaled air

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Certain gases in human breath are known to be indicators of the presence of diseases. These gases have been identified as biomarkers using different instruments, mainly based on chemical methods, e.g. gas chromatography or chemiluminescence. The article describes an application one of the most sensitive optoelectronic method – Cavity Enhanced Absorption Spectroscopy (CEAS) to investigation of fractional exhaled nitric oxide (FeNO). Measurement of FeNO concentration is a quantitative, non-invasive, simple, and safe method of respiratory...

P2.6 - Evaluation of Heater Temperature to Detect Gases in a Flowing Fluid

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In this contribution the behavior of a calorimetric flow sensor was investigated, at which only the temperature of the heater is evaluated. A time-dependent excitation (f = 1 Hz) was applied to the heating element with a constant power amplitude. The influence of different gases and flow velocities on the heater temperature were observed. Measurements and simulations were carried out in no-flow condition and in flowing fluids in order to obtain the restrictions regarding to...

P4.1 - Microwave-Based Diesel Particulate Filter Monitoring – Soot Load Determination and Influencing Parameters

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Diesel particulate filters (DPF) are essential for diesel exhaust gas aftertreatment in the automotive sector. For soot load determination, a novel approach using microwaves emerged recently. Based on the electrical conductivity of soot particles, the soot load of the DPF can be measured directly and in a contactless way by this method. Microwaves are impressed into the filter housing and the reflection and transmission is measured. In this study, in-operation dynamometer measurements are presented. Tests...

P5.3 - Machine-Vision-Based and Inertial-Sensor-Supported Navigation System for the Minimal Invasive Surgery

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The navigation of instruments, implants and patients in space has gained a broad acceptance for several years now. Especially in case of demand for minimal invasivity, navigated surgery has an enormous importance because of the decisive perceptual field expanding of the surgeons. The currently used systems in surgery are almost based on camera technology and image processing algorithms. The tracking solutions provide highly accurate three-dimensional position information of defined objects in space. On this basis,...

P5.4 - Thermal pattern generation for infrared deflectometry

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Operating in the visible spectrum, the method of deflectometry provides reliable surface-slope measurements. We present the extension of the method to the thermal infrared (IR) spectrum, thus enabling the deflectometric inspection of rough surfaces and objects made of transparent and nonspecular materials. Since affordable technologies to create code patterns in the thermal IR do not exist, we propose a novel method to produce large-scale dynamic thermal patterns with the help of a powerful laser. In...

4.3 - Emissivity measurement under vacuum in the wavelength range from 4 μm to 100 μm and temperature range from -40 °C to 500 °C at PTB

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A new facility of the Physikalisch-Technische Bundesanstalt (PTB) for emissivity measurement under vacuum was brought into operation capable to measure directional spectral emissivity in the wavelength range from 4 μm to 100 μm and temperature range from -40 °C to 500 °C. Here we present the measurement scheme with respect to the spectral radiance of two blackbodies at different temperatures and discuss the evaluation of the emissivity results. We present first results of emissivity measurements...

1.4 - Aktivierung der SnO2-Oberfläche durch O2-Spill-Over an Gold - Leistungsoptimierung des Sensors durch die Elektrode

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SnO2 Dickschicht Sensoren mit unterschiedlichen Elektrodenmaterialien wurden hinsichtlich ihrer sensitiven Eigenschaften gegenüber CO und H2 in trockener Umgebung getestet. Elektrische Messungen zeigen einen deutlichen Unterschied im Antwortverhalten der Sensoren. Je nach verwendetem Elektrodenmaterial – entweder Gold oder Platin – konnte durch gezielte Variation der Sauerstoffkonzentration eine starke Abhängigkeit der Interaktion von Sauerstoff an der Oberfläche gemessen werden. Spektroskopische Messungen an den MOX Schichten bestätigten diese Annahme. Beobachtungen dieser Art führen zu dem Schluss, dass ein...

7.2 - Application of High Resolution Ion Mobility Spectrometers for Fast Trace Gas Analysis

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Ion mobility spectrometers (IMS) are a widely used tool for fast trace gas detection, generally offering excellent limits of detection (LoD) in a short amount of time, but only mediocre resolution. In this work, we demonstrate an approach to vastly increase the resolution without sacrificing limits of detection or increasing the complexity of the measurement setup. Based on these findings, a compact ion mobility spectrometer with a drift length of less than 10 cm has...

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  • 2013
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